# MgO Partially Stabilized Zirconia (TTZ)

TTZ is a grade of zirconia. The graph bars on the material properties cards below compare TTZ to other oxide-based engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

## Mechanical Properties

Compressive (Crushing) Strength

2190 *MPa* 320 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

190 *GPa* 28 *x 10 ^{6} psi*

Flexural Strength

710 *MPa* 100 *x 10 ^{3} psi*

Fracture Toughness

9.9 *MPa-m ^{1/2}* 9.0

*x 10*

^{3}psi-in^{1/2}Knoop Hardness

1210

Poisson's Ratio

0.29

Tensile Strength: Ultimate (UTS)

410 *MPa* 60 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

650 *°C* 1200 *°F*

Maximum Thermal Shock

350 *°C* 660 *°F*

Specific Heat Capacity

430 *J/kg-K* 0.1 *BTU/lb-°F*

Thermal Conductivity

2.2 *W/m-K* 1.2 *BTU/h-ft-°F*

Thermal Expansion

8.8 *µm/m-K*

## Other Material Properties

Density

5.7 *g/cm ^{3}* 350

*lb/ft*

^{3}Dielectric Constant (Relative Permittivity) At 1 MHz

28

Dielectric Strength (Breakdown Potential)

7.7 *kV/mm* 0.3 *V/mil*

Electrical Dissipation At 1 MHz

0.0010

Electrical Resistivity Order of Magnitude

11 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

19 *points*

Stiffness to Weight: Bending

34 *points*

Strength to Weight: Axial

20 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

0.88 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Followup Questions

## Further Reading

Ceramic and Glass Materials: Structure, Properties and Processing, James F. Shackelford and Robert H. Doremus (editors), 2008

Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005